151 lines
3.5 KiB
Go
151 lines
3.5 KiB
Go
/*
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Copyright © 2024 Raul
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*/
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package cmd
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import (
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"bufio"
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"fmt"
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"github.com/spf13/cobra"
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"net"
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"strings"
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"time"
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)
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// serverCmd represents the server command
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var serverCmd = &cobra.Command{
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Use: "server",
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Short: "Main chat server",
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Long: `You can connect to this server by running the following command from
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a client:
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nc $SERVER_IP $PORT
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Assuming your IP is 192.168.0.30 and the server port is left on default the
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command would be as follows:
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nc 192.168.0.30 1302`,
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Run: func(cmd *cobra.Command, args []string) {
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server(cmd)
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},
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}
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func init() {
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rootCmd.AddCommand(serverCmd)
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// Here you will define your flags and configuration settings.
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// Cobra supports Persistent Flags which will work for this command
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// and all subcommands, e.g.:
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// serverCmd.PersistentFlags().String("foo", "", "A help for foo")
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// Cobra supports local flags which will only run when this command
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// is called directly, e.g.:
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// serverCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
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serverCmd.Flags().String("port", "1302", "Port to listen on")
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}
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var receiverIsStarted bool = false
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type chatter struct {
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Username string
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IP string
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}
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func server(cmd *cobra.Command) {
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var lport string
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port, _ := cmd.Flags().GetString("port")
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if port != "" {
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lport = port
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} else {
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lport = "1302"
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}
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ln, err := net.Listen("tcp", ":"+lport)
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cobra.CheckErr(err)
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fmt.Printf("Listening on port %v...\n", lport)
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masterChannel := make(chan string, 20)
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slaveChannel := make(chan string, 20)
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go masterReceiver(slaveChannel, masterChannel)
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// TODO: get channels properly working
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// receivingChannel := make(chan string)
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// sendingChannel := make(chan string)
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for {
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conn, err := ln.Accept()
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cobra.CheckErr(err)
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numOfClients++
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go handleConn(conn, slaveChannel, masterChannel)
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}
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}
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var numOfClients int = 0
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func masterReceiver(slaveChannel chan<- string, masterChannel <-chan string) {
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for {
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message := <-masterChannel
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for i := 0; i < numOfClients; i++ {
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slaveChannel <- message
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}
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}
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}
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// func receiver(conn net.Conn, ch chan string) {
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// fmt.Println("THE RECEIVER HAS BEEN STARTED, YOU CAN ONLY SEE THIS MESSAGE ONCE")
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// receiverIsStarted = false
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// for {
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// select {
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// case otherMessage := <-ch:
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// conn.Write([]byte(otherMessage))
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// default:
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// }
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// }
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// }
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func handleConn(conn net.Conn, slaveChannel <-chan string, masterChannel chan<- string) {
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defer conn.Close()
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//var otherMessage string
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go func() {
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for {
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//select {
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message := <-slaveChannel
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conn.Write([]byte(message))
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}
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}()
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IP := getIP(conn)
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t := time.Now()
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date := fmt.Sprintf("%d-%02d-%02d | %02d:%02d:%02d", t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), t.Second())
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final_message_connect := fmt.Sprintf("[%v] Received connection from %v!\n", date, IP)
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fmt.Print(final_message_connect)
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conn.Write([]byte("What's your name?\nName: "))
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name, err := bufio.NewReader(conn).ReadString('\n')
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if err != nil {
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numOfClients--
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return
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}
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var NewUser = new(chatter)
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NewUser.Username = strings.TrimRight(name, "\n")
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NewUser.IP = IP
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for {
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message, err := bufio.NewReader(conn).ReadString('\n')
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if err != nil {
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fmt.Printf(NewUser.Username + " disconnected!\n")
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numOfClients--
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return
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}
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finalMessage := fmt.Sprint("{" + NewUser.IP + "} " + NewUser.Username + ": " + message)
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fmt.Print(finalMessage)
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masterChannel <- finalMessage
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//conn.Write([]byte(message))
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}
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}
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func getIP(conn net.Conn) (IP string) {
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if addr, ok := conn.RemoteAddr().(*net.TCPAddr); ok {
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IP = fmt.Sprintf("%v", addr)
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}
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return IP
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}
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